Payroll discrepancies were rare in the feeder department that I worked in. It was a requirement for us to keep track of our hours to the 1/100 of an hour for hours of service reasons. I always checked my hours against the paycheck viewer on upsers.com before I received my check deposit record. I'd bring it to their attention right then and there, they would pull the operations report and it was immediately obvious if it was my fault or theirs. Everyone should keep their hours and their double time, etc in a little notebook. Just in case. When all else fails, ask your stewart.